I suspect you need a new radiator support to go with the rest of the front clip?
The sheet metal will bolt up to a suburban.
The wheel openings will be noticeably larger than the pickup/suburban rears and will take a good size tire to make them look right. Will probably take a larger tire on the front to look good than you can fit in the rear fenders, making this an interesting idea but in my mind probably not the best one.
In this thread I have some front fender measurements from both small and big trucks, the critical measurement for fitting a wider axle seems to be the inside to inside of the fenders at both front and rear of the wheel openings(wider on top so less worry there).
Just for info, I measured 1.5 or 2 ton AD front fenders (on the truck) to be 72" wide inside to inside of the lip at the bottom edge both front and rear of the wheel opening.
.....
1 ton (and smaller)
seems to be the 68" width measured inside the front fender lip at bottom of opening, same both front and back edges.
That translates to a 1.5 or 2 ton is about 4" wider over the front fenders than a baby truck.
